Refraction at a Curved Surface: a Fisherman in a Stream

question 47

Multiple Choice

Refraction at a curved surface: A fisherman in a stream 39 cm deep looks downward into the water and sees a rock on the stream bed. How deep does the stream appear to the fisherman? The index of refraction of the water is 1.33.

• A) 29 cm
• B) 52 cm
• C) 33 cm
• D) 45 cm

Describe the components and mechanisms of the immune system's response.

Explain the concept of vaccination and its importance in preventing disease.

Understand the role of mucous membranes and antimicrobial peptides in innate defense.

Grasp the significance of adaptive immunity's specificity and memory.